# Can you solve the giant iron riddle?

- Institution: TED
- Department: TED-Ed
- Speaker: Alex Gendler
- Year: 2018
- Level: For everyone
- Language: English
- Subjects: Mathematics
- Source: [TED](https://www.ted.com/talks/alex_gendler_can_you_solve_the_giant_iron_riddle)
- Licence: [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/) (Non-commercial use only, and no changed versions.)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

The family of giants you work for is throwing a fancy dinner party, but there's a problem — the elder giant's favorite shirt is wrinkled! To fix it, you'll need to power up the giant iron. It needs two batteries to work, but the baby giant mixed the working battery pile with the dead pile. Can you test the batteries so that you get a working pair in seven tries or less? Alex Gendler shows how. \[Directed by Artrake Studio, narrated by Addison Anderson\].

## Lectures

1. [Can you solve the giant iron riddle?](https://invisiblenetwork.ai/learn/ted/alex_gendler_can_you_solve_the_giant_iron_riddle/40db1a8621ae), 3 min (TED's player)